Personalized Thanksgiving Big Sis Announcement Turkey Youth T-Shirt. I'm thankful because I'm going to be a big Sis cute girl turkey Thanksgiving pregnancy announcement on a Youth T-Shirt - White. Let the good times roll in a durable T-Shirt that takes kids from school to play in an amazing array of colors. 5.0 oz., pre-shrunk 100% cotton. Seamless 1x1 rib collar.